Complete the embeddings manager.

[afmjoaa]

• [x] Complete Function token embeddings.
• [x] Complete Initial Function embeddings.
• [x] Complete Initial Word embeddings.

Done this part

[afmjoaa]

• [x] Complete the embedding manager class @Prattoy bhai

[Prattoy]

Done with Embedding Manager

[afmjoaa]

@Prattoy bhai, reviewed and found some minor bugs. Fixed them in the "Fix embedding manager bugs" commit, please review them in your free time.

We need to come up with a GitHub workflow.